1A2B

#define _CRT_SECURE_NO_WARNINGS
//#include <iostream>
#include <stdio.h>
//#include<assert.h>
#include<stdbool.h>

int main()
{
	int num1, num2;
	int array1[4], array2[4];
	int x = 0, y = 0;
	scanf("%d%d", &num1, &num2);
	for (int i = 0;i < 4;i++) {
		array1[3 - i] = num1 % 10;
		array2[3 - i] = num2 % 10;
		num1 = num1 / 10;
		num2 = num2 / 10;
	}
	for (int j = 0;j < 4;j++) {
		for (int k = 0;k < 4;k++) {
			if (array1[j] == array2[k] && j != k) {
				y = y + 1;
			}
		}
		if (array1[j] == array2[j]) {
			x = x + 1;
		}
	}
	printf("%dA%dB", x, y);

}